Sylvenus walker



UNITED STATES PATENT OFFICE.

SYLVENUS WALKER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND S. S.HEMENWAY, 0F SAME PLACE.

SASH-FASTENER.

Specification of Letters Patent No. 30,380, dated October 9, 1860.

To all whom 'it may concern:

Be it known that I, SYLvnNUs WALKER, of Boston, Massachusetts, haveinvented a new and Improved Construction of Sash- Fasteners; and I dohereby declare that the following is an exact description thereof,reference being had to the accompanying drawings, making a part of thisspecification.

The invention consists in the adaptation of one met-allie plate, havinga dovetailed mortise, to another metallic plate, consisting of adovetailed tenon, and these are so arranged with regard to each otherthat when the tenon is slid into the mortise the sash is duly and firmlyfastened, in a manner more minutely stated below.

In the accompanying drawings, Figure l represents the window frame,containing the sliding sashes, in perspective; Fig. 2, a sectional viewof the upper and lower sashes through line w of Fig. l; Fig. 3, adetached View of the mortised plate and its hook, D as attached to thelower sash; Fig. 4, a dove. tailed tenon plate to be received into themortised plate.

C, C, represent the window frame, C, the lower sash, C the upper sash.

D represents the thumb piece and hook, that is to be received into thehole (a) fastening down the window.

The sash C is fixed in place, while sash C is made to slide up and down.

It will be seen by inspecting Fig. 2 that when the lower sash is droppedinto its place, the hook of D, is received into its place in the hole(a) and constitutes the astening of the window sash. The fasteningconsists in nothing more than the mutual combination of plates A and Bin a manner now to be explained.

In Figs. 3 and 4 the whole of the fastening parts of the sash are shownseparately. Plate A is shown with the thumb piece D elevated and thehook projecting in front; the claw of which does not appear distinctlyin view. Piece D, is capable of being rotated in its bearings about 180degrees, so that the shank of the hook may be raised to the verticalposition above its bearings or dropped down into the vertical pendentposition, as shown in Fig. 2, when the hook is received into thecorresponding opening (a) and the sash is locked. The plate A is letinto the upper horizontal bar of the lower sash in its rear part andscrewed fast to the same by screws, in such manner that the two beveledfaces (f, f,) shall be inward. The plate, B, is screwed upon the frontor inner face of the lower bar of the upper sash and is received as adovetailed tenon between the beveled faces (f, f,) of plate A.

It should be remarked that two positions of the lower sash are shown inFig. 2. The lower one shows the hook of D received into the opening (a)of plate B, in which position the sash is fastened. The second or upperposition of the sash, represents the hook of D as having been detachedfrom the opening (a) and raised some inches above it. This relativeposition of the plates A and B and hook piece D indicates the use andoperation of the fastening. But that there may be no misunderstanding Iwill state the operation.

The parts of the sash being in the position seen in Fig. 1, the handle Dis seized by the thumb and finger and raised up so as to'detach the hookfrom the opening (a) in plate B, when it may be elevated to any pointdesired; and if it be desired to fasten the window when once open, theweight of the window will carry it to its place, and the 'hook of D, atonce drops into its opening (a) and the window is firmly fastened.

Having now described the nature of the invention and the inode of usingthe same, I would remark that I am aware of the great variety of levers,hooks, and catches that have been adapted to fasten window sashes, and Ido not therefore claim broadly the use of a hinged hook or thumb pieceas a lock for sashes, nor do I claim any of the forms of side locks orbolts for the fastening as adapted to the sides of sashes, mine beingonly applicable to the two opposite and contiguous cross bars, one ofthe upper and the other of the lower sash.

Therefore I claim- In combination with the cross-bars of window sashes,the arrangement of plates A and B when these are locked together by thehook of D, in the manner, and for the purpose herein set forth.

SYLVENUS WALKER. Witnesses:

WM. P. SPENGE, THos. C. SAvoRY.

